Guirado, N., Sakai, E., & Ambrosano, E.J. 2001 Avaliaçao do efeito do oleo extraido de semestes de O. indica no controle da cochonilha ortezia. [The evaluation of the effect of oil extracts of Azadirachta indica seeds in the control of Orthezia praelonga in Pera orange trees.]. Revista de Agricultura Piracicaba 76(3): 401-409.

Notes: The effect of Azadirachta indica (neem oil) in the control of Orthezia praelonga in 13 year old Pera orange trees grafted on Rangpur lime, in the municipality of Piracicaba, State of Sao Paulo, Brazil, was evaluated in a study beginning July 2000. Four randomized blocks were used, with one tree plot including four treatments plus control. Treatments were 50 or 60 ml p.c. of neem oil/100 ml, and 500 or 1000 ml of neem oil/100 litres. The evaluation was carried out by counting the number of live female adults on two branches per tree, at 0, 3, 6, 12, 24 and 48 days after treatment. Neem oil at the 1% concentration was efficient in the control of insects, with results similar to those of 150 ml of methidathion/100 litres. Further treatment is necessary after 30 days to control new invasions.